As seen on your other post, I get 10 on the freeway at usual LA-Orange County speeds (85 MPH), I get 7 in town and about 2 MPG when it's on the floor. I have a 408 Stroker, 4.11s, lots of lift, top on with a mondo roofrack, 33's (which are too small for it now) and a 28% Overdrive. I'm sure an adjustable metering block and slower freeway speeds would give me a little better mileage but probably not that noticeable.